Practice Test Geeks(CET) Certified Electrocardiogram Technician Practice Test
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Pediatric ECG Considerations Flashcards

7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. The normal resting heart rate for a 2-year-old child is approximately:

    Answer: 80–130 bpm

    Normal resting heart rate for a 2-year-old is 80–130 bpm; heart rates decrease progressively with age from infancy through adolescence.

  2. Which lead is MOST useful for identifying P waves and evaluating atrial activity in pediatric patients?

    Answer: Lead II

    Lead II is oriented parallel to atrial depolarization, producing the tallest and most visible P waves, making it the preferred lead for rhythm analysis and P-wave evaluation.

  3. A 14-year-old athlete's ECG shows early repolarization with J-point elevation of 1 mm in the lateral leads. This is MOST likely:

    Answer: A normal variant common in young athletes

    Early repolarization with mild J-point elevation is common in young athletes and typically represents a benign normal variant related to increased vagal tone.

  4. During a pediatric ECG, the technician notices 60-Hz electrical interference on the tracing. The BEST intervention is:

    Answer: Check electrode connections and remove sources of electrical interference

    60-Hz artifact is caused by poor electrode contact or nearby electrical devices; checking and resecuring all electrode connections and removing electrical sources eliminates this interference.

  5. Which pediatric ECG finding should prompt immediate evaluation for hypertrophic cardiomyopathy (HCM)?

    Answer: Deeply inverted T waves and voltage criteria for left ventricular hypertrophy

    HCM produces LVH voltage criteria combined with deep, widespread T-wave inversions—often the electrical hallmark of this condition and a leading cause of sudden cardiac death in young athletes.

  6. The ECG of a newborn shows peaked T waves and a widened QRS. Serum potassium is 7.2 mEq/L. The FIRST ECG change seen with hyperkalemia is typically:

    Answer: Peaked, tall T waves

    Tall, peaked T waves are the earliest ECG manifestation of hyperkalemia; as potassium rises further, PR prolongation, P-wave flattening, QRS widening, and eventually a sine wave pattern develop.

  7. A 5-year-old's ECG shows a PR interval of 240 ms. This finding represents:

    Answer: First-degree AV block

    A PR interval exceeding 200 ms in a child represents first-degree AV block, indicating delayed conduction through the AV node; in a 5-year-old, 240 ms is clearly prolonged.